A fair few DVDs use so Macrovision's so called protection (in actuality if you were to call it two-bit you probably would not be wrong) so any video will come out looking like the tracking is off on a VCR or not at all.
There are macrovision busters around but a) you will probably have to build it, not to mention find specs (macrovision have a serious bug about this sort of thing) b)You can rip any commercial DVD flawlessly (these recorders will impact quality) in under half a hour (15mins for a quick drive) why bother.
I believe macrovisions fee goes out as a percentage sale anyhow (or a nice bit of wedge) so many companies no longer use it and most independents will not either.